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Entropy squeezing of a degenerate two-photon process with a nonlinear medium

机译:非线性介质的简并双光子过程的熵压缩

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This paper presents new results on some aspects of the properties of the entropy squeezing in the time development of a degenerate two-photon of a single-mode interacting with a two-level system with a nonlinear medium. A general analytic expression for the density matrix is obtained on the basis of a Hamiltonian generalized in that it includes nonlinear effects and Stark shifts, by means of which we identify and numerically demonstrate the region of parameters where significantly large squeezing can be obtained. The influence of various parameters on the entropy squeezing are explored. It is shown that features of the entropy squeezing were influenced significantly by changing the nonlinear medium, Stark shift and the detuning. The results show that, certain amounts of the nonlinear effect yield the superstructure of atomic Rabi oscillation and changes the quasiperiod of the entropy evolution and atomic inversion.
机译:本文给出了退化的双光子的单模态与非线性介质与两能级系统相互作用时的熵压缩性质的某些方面的新结果。密度矩阵的一般解析表达式是在哈密顿量的基础上获得的,该表达式包括非线性效应和Stark位移,借助它们我们识别并数值证明了可以得到很大挤压的参数区域。探索了各种参数对熵压缩的影响。结果表明,改变非线性介质,Stark位移和失谐会极大地影响熵压缩的特性。结果表明,一定量的非线性效应产生了原子拉比振荡的上层结构,改变了熵演化和原子反演的准周期。

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